764655806916 has 81 divisors (see below), whose sum is σ = 2053506475111. Its totient is φ = 239864035584.

The previous prime is 764655806861. The next prime is 764655806963. The reversal of 764655806916 is 619608556467.

The square root of 764655806916 is 874446.

It is a perfect power (a square), and thus also a powerful number.

764655806916 is a `hidden beast` number, since 7 + 6 + 4 + 6 + 558 + 0 + 69 + 16 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10050864516 + 754604942400 = 100254^2 + 868680^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 89189206 + ... + 89197778.

Almost surely, 2^764655806916 is an apocalyptic number.

764655806916 is the 874446-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 764655806916

764655806916 is an abundant number, since it is smaller than the sum of its proper divisors (1288850668195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

764655806916 is an equidigital number, since it uses as much as digits as its factorization.

764655806916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17190 (or 8595 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 63.

The spelling of 764655806916 in words is "seven hundred sixty-four billion, six hundred fifty-five million, eight hundred six thousand, nine hundred sixteen".